Which of the following is false about plant
hormones?
a. They bind to receptors on target cells.
b. Their mechanism of action is completely
different from that of animal hormones.
c. Signal transduction may influence a metabolic
pathway.
d. The plant response may depend on a change in
gene expression.
e. Signal transduction may involve shape change
by a receptor.
Answer: b
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Ecology
A. requires the study of plants. B. is the study of the environment. C. primarily studies animals. D. works for the good of the environment. E. includes the study of interactions between organisms and their environment.
Exposing E. coli to calcium ions and DNA, then incubating the culture at low temperatures followed by heat shocking
induces ____.
a. artificial transformation b. a double crossover c. a single crossover d. DNA replication e. infection
What % of energy will be transferred from one trophic level to the next?
a. 5 - 20% b. 5 - 25% c. 5 - 10% d. 5 - 15% e. 5 - 30%
If an ovary contains 50 ovules, what is the minimum number of pollen grains that must land to form 50 mature seeds?
A) 25 B) 50 C) 100 D) 500